Improved chair-bottom



tstrd mes strat @Wire Letters Patent No. 99,441, dated February/.1,1870.

IMPRovED CHAIR-BOTTOM.

The Schedule referred to iu these Letters Patent and making part or thesame 10 all whom tt'may concern:

Be it known that I, PLATT C. INenRsoLL, of Green Point, in the countyof' Kings, and State of New York, have invented a new and usefulImprovementin Chair- Bottoms, of which 'the following is a full, clear,and exact description, reference being had to the accompanying drawing,forming part of this specification, and in which- Figure 1 represents avertical section of a chair with v,my improved bottom applied thereto,and

Figure 2, an inverted plan ofthe seat-portion ofthe chair, inillustration of said improvement.

Figure 3 is a vertical section, through one of the looped metal bracesused in the construction of the improved chair-bottom, showing theconnection of said brace with the spiral spring and interposed rubberbar.

The invention consists in a novel combination and arrangement ot' acentral spiral spring, -looped metal braces connecting said spring, atits upper end, with the chair frameand lower metal straps, on which thespring is made to rest, whereby a steady and effective spring-likeaction is secured to the cushion, and the spring is restrained fromshutting down, so asto injure it or produce discomfort to the occupantot' the chair; and the invention, in such connection, includes acombination with said spring and metal braces, of rubber bars or strips,arrauged'within the loops ot' the braces, and interposed between themandthe spring on its outside, to secure a steady action of the bracesand spring, and to take Jup lost motion consequent on the play ot' thebraces.

Referring to the accompanying drawing- A represents the seat-portion oftheframe of the chair, and B, a cushion arranged thereon, and which issupported through the open seat-frame by a cen- Siniilar letters ofreference indicate corresponding trally-disposed spiral spring, G, oftapering construction, and diminishing in diameter in a downwardlydirection, said spring cent1-ing in and resting, at its lower end, onmetal straps D D, secured at their ends to the chair-frame, and servingto brace the latter, while the upper end of the spring is Vsteadied, andan extended bearing-surface, in connectionwith it, secured to thecushion, by means of metal braces E E E E, fastened at their outer endsto the seat-trame, preferably at its corners or angles, and connected attheir inner ends by loops (L a t u, with the upper coil ofthe spring, sothat on pressure being brought to bear upon the cushion, the strain willbe communicated through the braces to the spring, and 'the latterbesteudied by the braces which play with the spring, and ease itsaction, also prevent/it from shutting down, so'as to endanger breakageor produce discomfort to the occupant ot' the chair.

To render more perfect the connection. of the braces with the spring,and take up thelost motion consequent upon the play of the ends of thebraces relatively tothe movement of the spring, I interposc withineachloop a., between it vand the out-er edge of the upper coil ot' thespring, a bar or strip, b,` of India rubber, which serves to soften theaction ofthe brace, and prevent jar or rattle.

What is here claimed, and desired to loe secured by Letters Patent, is-

1. The combination and arrangement, substantially as specified, of themetal braces E E E E, formed with loops c a d a at their inner ends, thespiral spring C, and the metal straps D D, with the chairirame or seat.

2. The arrangement of rubber bars or strips b within the loops a ot' thebraces E, in combination with the spring C and metal straps D,essentially as shown and' described.

P. C. INGERSOLL. YVitn esses:

' FRED. HAYNES,

R. ERABEAU.

